Modal verbs

It isn’t necessary for you to go out at this time at night.

• You must go out at this time at night.

• You should go out at this time at night.

• You needn’t go out at this time at night.

• You may not go out at this time at night.

It isn’t necessary for you to worry about these trivial things.

• You may worry about these trivial things.

• You needn’t worry about these trivial things.

• You shouldn’t worry about these trivial things.

• You must worry about these trivial things.

It’s compulsory for you to correct all these mistakes.

• You must correct all these mistakes. 

• You should correct all these mistakes.

• You needn’t correct all these mistakes.

• You may not correct all these mistakes.

It’s compulsory for you to call him and tell him the truth.

• You can call him and tell him the truth.

• You must call him and tell him the truth.

• You shouldn’t call him and tell him the truth.

• You may not call him and tell him the truth.

It’s compulsory for you to contact the customer and give her an explanation.

• You needn’t contact the customer and give her an explanation.

• You must contact the customer and give her an explanation.

• You may contact the customer and give her an explanation.

• You shouldn’t contact the customer and give her an explanation.

You are not allowed to use red ink in the exam.

• You should use red ink in the exam.

• You may use red ink in the exam.

• You mustn’t use red ink in the exam.

• You needn’t use red ink in the exam.

You are not allowed to step on the grass in this area.

• You cannot step on the grass in this area.

• You may step on the grass in this area.

• You should step on the grass in this area.

• You mustn’t step on the grass in this area.

It’s not good for you to drive at that high speed.

• You may drive at that high speed.

• You needn’t drive at that high speed.

• You must drive at that high speed.

• You shouldn’t drive at that high speed.

It’s not good for you to be aggressive to customers.

• You need to be aggressive to customers.

• You shouldn’t be aggressive to customers.

• You may not be aggressive to customers.

• You must be aggressive to customers.

It’s necessary for you to type this document as soon as possible.

• You can’t type this document as soon as possible.

• You may not type this document as soon as possible.

• You need to type this document as soon as possible.

• You must type this document as soon as possible.